Chorioamnionitis, second trimester, fetus 5

This code signifies an inflammatory infection of the fetal membranes (amnion and chorion) and amniotic fluid occurring during the second trimester of pregnancy, specifically affecting the fifth fetus in a multiple gestation. This condition can lead to significant maternal and fetal complications, including preterm labor, sepsis, and neonatal morbidity.

Apply this code when documentation confirms a diagnosis of chorioamnionitis in a pregnant patient during her second trimester, and it is specifically identified as impacting the fifth fetus in a multifetal pregnancy. Supporting documentation should include clinical signs of infection (e.g., maternal fever, uterine tenderness, foul-smelling amniotic fluid) and/or laboratory findings (e.g., elevated white blood cell count, positive amniotic fluid culture).

• Ensure the documentation clearly specifies "second trimester" and identifies the affected fetus as the "fifth fetus" in a multiple gestation.
• Do not use this code for chorioamnionitis occurring in other trimesters or affecting a different fetal number.
• Code any associated maternal or fetal complications, such as preterm labor (O42.x, O60.x) or fetal distress (O43.x), in addition to this code.